The 500W11 is a single stage
hydronic geothermal heat pump that's used for water - to - water applications and provides hot water for a fraction of the cost of a traditional system.
The 504W11 is a single stage
hydronic geothermal heat pump with OptiHeat technology that's used for high temperature water - to - water applications.
Not exact matches
The house has four heating systems: solar hot water, a
hydronic boiler, and a geo - exchange (
geothermal or GSHP).